Product Information
CAS number	69-72-7
EC number	200-712-3
Grade	Ph Eur,BP,USP
Hill Formula	C₇H₆O₃
Chemical formula	HOC₆H₄COOH
Molar Mass	138.12 g/mol
HS Code	2918 21 00
Structure formula Image

Physicochemical Information
Boiling point	211 °C (1013 hPa)
Density	1.443 g/cm3 (20 °C)
Flash point	157 °C
Ignition temperature	500 °C
Melting Point	157 - 159 °C
pH value	2.4 (H₂O) (saturated solution)
Vapor pressure	<1 hPa (100 °C)
Bulk density	400 - 500 kg/m3
Solubility	2 g/l

Toxicological Information
LD 50 oral	LD50 Rat 1250 - 1580 mg/kg
LD 50 dermal	LD50 Rat > 2000 mg/kg

Safety Information according to GHS
Hazard Pictogram(s)
Hazard Statement(s)	H302: Harmful if swallowed. H318: Causes serious eye damage.
Precautionary Statement(s)	P280: Wear eye protection. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P313: Get medical advice/ attention.
Signal Word	Danger
RTECS	VO0525000
Storage class	10 - 13 Other liquids and solids
WGK	WGK 1 slightly water endangering
Disposal	3 Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.

Safety Information
Hazard Symbols	Harmful
Categories of danger	harmful, irritant
R Phrase	R 22-41 Harmful if swallowed.Risk of serious damage to eyes.
S Phrase	S 22-24-26-39 Do not breathe dust.Avoid contact with skin.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear eye/face protection.

Storage and Shipping Information
Storage	Store at +15°C to +25°C.

Specifications
Assay (acidimetric; calculated on dried substance)	99.5 - 100.5 %
Assay (HPLC, calc.on dried substance)	98.0 - 102.0 %
Identity	passes test
Appearance of solution (10 %; ethanol 96 %)	passes test
Chloride (Cl)	≤ 0.0100 %
Sulphate (SO₄)	≤ 0.0200 %
Heavy metals (as Pb)	≤ 0.0020 %
Related substances / HPLC (EP) (4-Hydroxybenzoic acid)	≤ 0.1 %
Related substances / HPLC (EP) (4-Hydroxyisophthalic acid)	≤ 0.05 %
Related substances / HPLC (EP) (Phenol)	≤ 0.02 %
Related substances / HPLC (EP) (Largest unspecified impurity)	≤ 0.05 %
Related substances / HPLC (EP) (Sum of all impurities)	≤ 0.2 %
Related substances / HPLC (USP) (4-Hydroxybenzoic acid)	≤ 0.1 %
Related substances / HPLC (USP) (4-Hydroxyisophthalic acid)	≤ 0.05 %
Related substances / HPLC (USP) (Phenol)	≤ 0.02 %
Related substances / HPLC (USP) (Largest unspecified impurity)	≤ 0.05 %
Related substances / HPLC (USP) (Sum of all impurities)	≤ 0.2 %
Residual solvents (ICH Q3C)	passes test
Sulfated ash	≤ 0.05 %
Loss on drying	≤ 0.5 %
Residues of metal catalysts or metal reagents acc. to EMEA/CHMP/SWP/4446/2000 are not likely to be present. corresponds to Ph Eur, BP, USP

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